salisbury



(NQ Model.) 3 Sheets-Sheet 1.

S. C. SALISBURY.

PRRD WATRR REGULATOR.

No. 265,542.' Patented 061;.3, 1882..

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S a 31 www (No Model.) '3 sheetssheet 2.

' S. C; SALISBUEY.

FEED WATER REGULATOR.

No. 265,542. Patented 0015.3, 1882.

3 Sheets-Sheet 3.

S. C. SALISBURY.

EEED WATER REGULATOR.

(No Model.)-

'Patented 061;. 3,4882.

.Inventor UNITED STATES PATENT Ormea.

SILAS C. .SALISBURY- OF NEW YORK,

N. Y., ASSIGNORTO THE AMERICAN FEED-WATER REGULATOR.

SPECIFICATION forming part of Letters Patent No. 265,542, dated October3, 1882.

Application tiled January 30, 1882. (No model.)

To all whom it may concern.:

Be it known that I, SrLAs CovEL SALrs- BURY, of the city, county, andState of New York, have invented a new and useful Improvement in FeedWater Regulators for Steam-Generators and I do hereby declare thatl thefollowing is a full and accurate description ofthe same.

This invention relates to that class of feed- IO Water regulatorswherewith the feed-pump is supposed to be constantlyT running, but withspeed in accordance with the evaporation going on in the boiler by meansof an automatic control of the throttle-valve in the steam-pipe I whichconducts steam vto the pump. For this method of controlling the supplyof feed-water Letters Patent No. 246,215 were issued to me August 23,1881. My present invention is therefore an improvement on saidinvention,

to adapt it to certain locations. I therefore do not propose to claim inthis patent the general structure and arrangement of controlling iioatand throttle-valve shown in said application, but only the structure andarrangement in addition thereto shown herein.

A particular object of this improvement is to adapt my invention tolocomotive steamgenerators, wherein the water within the generator maybe liable to concussion and movements from side to side. Another objectis to increase the sensitivenessor the throttle-valve. It is evident,however, that this improvement is equally well adapted to stationarygenerators of all kinds, especially sectional generators.

My improvement consists, first, in a {loatchamber interposed in the lineof the feedpump steam-pipe, containing a oat mounted upon a stem or rodwhich moves in guides to 4o restrain the float from lateral movements, a

throttle-and-lever movement within said steampipe, and a supplemental orauxiliary lever within the float-chamber, whereby the vertical movementsof said float, but not its lateral movements, will be transmitted to thevalve;

second, also, in the structure of the Boat; third, in the arrangement,in connection with the valve-movement alluded to above, of athrottle-valve inthe steam-pipe.

That others may fully understand my improvement, Iwill particularlydescribe it, having reference to the accompanying drawings, wherein-Figure 1 is a perspective view, showing my improvement detached. Fig. 2is a longitudi- 55 nal vertical section of the same. Fig. 3 is aperspective showing the application to a stationary boiler.` Fig. 4 is arear elevation, showing the'mode of applying to a locomotiveboiler. Fig.5 is a section of the float, show- 6o ing the tubular stays. Fig. 6 isan elevation showing the circulation-pipes of a bank oi' boilers.

A is the boiler, which may be locomotive or stationary, but forconvenience a stationary boiler is shown; and B is the steam-pipe takingsteam to the pump C.

ln the line of the steam-pipe B there is interposed a float-chamber, W,which is connected at its bottom with the water-space in the 7o boiler,so that the water .will stand in said chamber at the same level as inthe boiler.

The tloat E may be made in any approved way; butl prefer a mannerwhichwill be hereinafter described. The stemfot' the`iloat E is 75 madesufciently -stift' to resist the 'lateral thrust of the iioat when thechamber oscillates from side to side during the movements of thelocomotive, and said stem moves in guides g at top and bottom. Near thetop ot the stem 8o fit engages with a lever, Gr, which at its oppositeend is pivoted to some rigid support under the chamber mostconvenient-ly to a stud, IL, which is screwed into the side of thechamber.

At a proper point between the fulcrum-pin and place of engagement withthe stem f a rod, t', is mounted and joined to the lever Gr, and saidrod t' extends therefrom upward into the passage-way J and engages withthe lever go K, which at its opposite end engages with and controls thestem lof the throttle-valve M.

It is only desirable that the iioat-chamber shall be sufficiently largeto accommodate the float, because the larger the body of water con- 95ned in said chamber with the iloat the greater will be the lateralthrust ot' said Water against the oat when the boiler sways from side toside in its movements. I therefore prefer to make the water-space ofsaid chamber W but roo slightly larger in horizontal cross-section thanthe float which it is to contain; but near its top I make a lateralenlargement or offset, d, to accommodate the lever Gr. The proper lengthof said lever and the dimensions ofthe offset d are, however, variableand dependent upon the dimensions and purposes of use of the relativeparts. While the steam is escaping to an engine in action the water in astationary boiler is in a constant state of oscillatory lnotion, due tothe ebullition which is constantly going on. In locomotiveboilers thismotion is greatly increased by the agitation of the boiler itself' as itadvances along the track. All such movements of the fluid in the boilerare communicated to theuid inthe tloat-chamber, and the float and valve,if not restrained, will partake of these movements, and the escape ofsteam to the feed-pump will be uneven. To obviate these objectionableeffects I bring the steam in so that the steam-pressure tends to forcethe valve open, and thereby force the float deeper into the water. Thisaction has a tendency tq steady the float, especially as the oscillationot the water iu ebullition is accompanied by a corresponding andcoincident oscillation in steam pressure, and these two forces areplaced in opposition to neutralize each other. The oat and valve arethereby rendered perfectly steady and capable of responding to theslightest variation in Waterlevel, and the action ot' the pump isrendered correspondingly steady and capable ot' varying immediately andto the smallest variations of water-level.

It has been customary' to construct similar floats of sheet-copper;butthis methodis costly, and I propose to make them of cast metal,preferably of brass or bronze, with strength ening-ribs r properlydisposed, or with stays inserted, whereby the comparatively soft castmetal may be stiifened to resist any pressure or hard usage to whichitmay be subjected. A fioat so constructed is shown in Figs. 2 and 5.This float may be cast in one or two pieces, as most convenient, and thestays t t are inserted to enable it to resist external pressures moreeffectively than it would do if unprovided with such stays. These staysmay beinserted as screw-bolts or otherwise; but I prefer to employtubes, which are secured by expanding the ends in the ordinary way ofsecuring tubes in boilers.

A valve which closes against the steampressure has always the lpressureof steam upon the valve to oppose oscillations caused by the bodily ortremulous movements of the water, occasioned by the ebullition going onin the boiler. Such bodily movements will be greatly augmented by themotion of a locomotive-boiler. Every oscillatory motion of the tioatproduces a similar motion of the valve and uneven action of thefeed-pump.

The structure above described secures the utmost steadiness, delicacy,and freedom from oscillation, and therefore enables the float to controlthe throttle with reference to minute variations ot' the water-level.

When several boilers are set in bank, as shown in Fig. 6, I connect thewater-spaces of the several boilers by a water-pipe,p, and also connectthe steam spaces or domes by a steam-pipe, s. This equalizes thecirculation perfectly and insures a uniform water-level and a uniformsteam-pressure in the several boilers, notwithstanding the condition ofthe several fires may be different, and it obviates the necessityof morethan one feed-water regulator for the whole bank.

It is desirable that the feed-water regulator may be detachable from theboiler' without disabling the latter, and I therefore cut oi' valves Q.Q in the steam and Water pipes between the regulator and the boiler, andI also insert unions R R in said pipes between said valves Q and theregulator. The latter can then be cut ott' and detached at any time,whether the generator be detached or not.

Having described my il1ventioii,\vhat I claim as new isl. A steam-pipefrom the boiler to the feedpump and interposed therein a float-cham ber,D, having communication at the bottom with the water-space of saidsteam-generator, a oat within said chamber, and a lever, G, fulcrumed atone end on the chamber-wall, and engaged at the other end with the stemof said float, combined with a throttle-valve in said steam-pipe and thelever K and rods t' I, whereby said throttle is connected with andcontrolled by said lever Gr and loat E.

2. A oat, E, constructed of a hollow shell of cast or other metal,provided with tubular stays to strengthen said shell to resistcompression from without, substantially as set forth.

A float, E, combined with a throttlevalve and its lever in thesteam-pipe ot` the feed-pum p and connecting mechanisms, whereby saidvalve may be controlled, the water and steam pressure opposing eachother to repress oscillation of the valve and prevent uneven feed ofsteam tothe steam-pump, so that the amount of steam which enters thesteampipe may be exactly sufficient to cause the feed to be exactlyequal to the amount evaporated.

4. A metal float made in two parts united by seaming without solder orbrazing, and provided with internal stays to insure lightness, strength,and a perfect protection against co1- lapse and leaks.

5. The float-chamber D, adapted to receive the float with the smallestpossible surplus surrounding space and the lateral extension of offsetd,whereby the oscillations of the contined water will have but littleeffect ot' disturbance on said i'loat,and the lever Gmay be receivedwithin the chamber, substantially as set forth.

SILAS GOVEL SALISBURY. Vitnesses HENRY K. THOMAE, E. A. GARTHWAITE.

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